mapfile.h

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/* ////////////////////////////////////////////////////////////////////////
//
//                  INTEL CORPORATION PROPRIETARY INFORMATION
//     This software is supplied under the terms of a license agreement or
//     nondisclosure agreement with Intel Corporation and may not be copied
//     or disclosed except in accordance with the terms of that agreement.
//          Copyright(c) 2002-2005 Intel Corporation. All Rights Reserved.
//
//
//
*/

/*
//  This file contains two classes to enclose system routines for
//      file opening/closing and for mapping/unmapping view of file in memory
//      space. The file mapping in program memory space makes possible the use
//      of pointers to access file data, that gives the common way to process
//      data by any C functions without explicit data copying.
//
//
//
*/

#ifndef __MAPFILE_H__
#define __MAPFILE_H__

#include "syscross.h"

class File
{
public:
    typedef enum
    {
        Read,
        ReadWrite,
        NewReadWrite
    } Access;

    File();
    File(const char *fileName, Access access = Read);

    ~File();

    void Open(const char *fileName, Access access = Read);

    void Close();

    unsigned int   Size()    const;
    operator SysFile() const {return m_hFile;}

protected:
    SysFile m_hFile;
};

class MapFile
{
public:
    MapFile();
    MapFile(const char *fileName);
    MapFile(const char *fileName, int size);

    virtual ~MapFile();

    void Open(const char *fileName);
    void Open(const char *fileName, int size);

    void Close();

    void*        Data() const { void *addr; sysMemoryMapViewGetAddr(m_hMapView, &addr); return addr; }
    unsigned int Size() const { return m_file.Size(); }

protected:
    File             m_file;
    SysMemoryMap     m_hMap;
    SysMemoryMapView m_hMapView;
};


#endif // __MAPFILE_H__